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Infrared Digital Thermometers


Infrared thermometers are designed for applications requiring users to instantly measure temperature in hard-to-reach areas

http://www.fluke.com/fluke/inen/products/Thermometers.htm


Temperature measurement • Contact Type Thermometers – Uses temperature probes / thermo-couples – Highly accurate, good for Lab / calibration work

• Non-Contact Thermometers – Uses Infra Red beams to measure surface temperature – Moderate accuracy for day to day work

http://www.fluke.com/fluke/inen/products/Thermometers.htm


Why IR thermometers - 3 main reasons • Safety – – –

From high temperature objects From high voltages (temperature at circuit breakers terminals, bus-bars) Moving objects - Rotating motors, conveyors, belts

• Hard to Reach – – –

Object mounted at heights Object mounted inside safety perimeter Objects at hard to reach places

• Convenience – –

IR thermometer is easy to use Just point-shoot-measure

http://www.fluke.com/fluke/inen/products/Thermometers.htm


Important Parameters – IR Thermometers •

Emissivity

A numerical value between 0 and 1 which indicates the ability of an object to emit infrared energy.

Emissivity is determined primarily by the material from which an object is constructed and its surface finish.

Examples: – Polished brass: 0.03 – Roughly polished copper: 0.07 – Black lacquer paint: 0.96 – Circuit boards

http://www.fluke.com/fluke/inen/products/Thermometers.htm


Important Parameters – IR Thermometers •

DISTANCE TO SPOT RATION Ratio of the distance from the measured object vs. sampling spot size EXAMPLES: - 4:1 optical resolution: 4” away from measured object ⇒ 1” diameter - 12:1 optical resolution: 24” away from measured object ⇒ 2” diameter

OBJECT SIZE

Know your application! An IR device with a 4:1 optical resolution can not effectively be used to measure a diffuser temperature 15’ away.

http://www.fluke.com/fluke/inen/products/Thermometers.htm


Important Parameters – IR Thermometers FIELD OF VIEW - Field of view refers to the target size relative to the IR thermometer’s spot size . - Ideally, the target surface to be measured should be twice the size of the spot . - If the spot size is larger than the surface to be measured, measurement errors are increased . - Spot size calculator www.Fluke.Com

http://www.fluke.com/fluke/inen/products/Thermometers.htm


HOW DOES IR THERMOMETER WORK Infrared thermometers measure the surface temperature of an opaque object

The thermometer’s optics sense emitted, reflected, and transmitted energy, which is collected and focused onto a Detector

The unit’s electronics translate the information into a temperature reading which the unit displays

http://www.fluke.com/fluke/inen/products/Thermometers.htm


IMPORTANT SPECIFICATIONS FOR SELECTION OF RIGHT IRTHERMOMETER • Temperature range • Measurement accuracy • Distance to Spot Ratio • Rugged & Reliable • Response time • Display resolution • Battery life

http://www.fluke.com/fluke/inen/products/Thermometers.htm


OPERATING THE IR THERMOMETER •

To measure temperature, point the thermometer at an object and pull the trigger.

Laser pointer to help aim the thermometer

To find a hot or cold spot, aim the thermometer outside the desired area.

As the distance from the object being measured increases, the spot size of the area measured by the unit becomes larger

For accurate measurements, make sure that the target is larger than the unit’s spot size

The display retains its last infrared measurement for twenty seconds when the trigger is released, with HOLD appearing on the display

The stored data can be downloaded to a personal computer (PC) via the included USB cable and the included Fluke View Forms Documenting Software

http://www.fluke.com/fluke/inen/products/Thermometers.htm


SAFETY PRECAUTIONS •

Before using the thermometer inspect the case. Do not use the thermometer if it appears damaged. Look for cracks or missing plastic. Pay particular attention to the insulation around the connectors

Disconnect the thermocouple(s) from the thermometer before opening the case

Replace the batteries as soon as the battery indicator appears. The possibility of false readings can lead to personal injury

Do not use the thermometer if it operates abnormally. Protection may be impaired. When in doubt, have the thermometer serviced / calibrated at authorized labs.

Reflective objects result in lower than actual temperature measurements. These objects pose a burn hazard Do not operate the thermometer around explosive gas, vapor, or dust

http://www.fluke.com/fluke/inen/products/Thermometers.htm


Company Name : Fluke Corporation - India

Website: http://www.fluke.com/fluke/inen/home/default.htm

Address: Division of DHR Holding India Pvt. Ltd. 10th Floor, Sigma Hiranandani Business Park, Powai Mumbai, Maharashtra 400076

Contact Number: 1 800 209 9110

http://www.fluke.com/fluke/inen/products/Thermometers.htm


Thank You


Infrared Thermometers - Basic Guide  

Learn the basics of Infrared Thermometers and its applications.

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